/Engine/Source/Runtime/Landscape/Classes/LandscapeComponent.h
void ForEachLayer ( [TFunctionRef](API\Runtime\Core\GenericPlatform\TFunctionRef)< void(const [FGuid](API\Runtime\Core\Misc\FGuid) &, struct [FLandscapeLayerComponentData](API\Runtime\Landscape\FLandscapeLayerComponentData) &)> Fn )